The last animation commission I did for someone, a flat rate for the entire project was easier to establish than accounting a price per hour spent working on it. I think depending if the quality is on level, it should be about 50-100 dollars per minute of animation. Also a good chunk of revenue should go to the animators, and dividing it up depends on how many of them were involved.
On a different note, if a friend who is a good artist asks for help, I'd gladly do it if I could. As payment, he or she might help me out in the future when I need it.
olipido
Is this you asking for people to do those? Because I would voice act for free.
Pikanjo
It might come up.